For me, year 11 was a really fun year
Teachers care about you more, they want you to do well so help whether they can. Exam/study leave was great, although nerve wracking at times. As soon as you get the first few exams out of the way, it's so chill. Also, year 11 summer was the best - 10 long weeks of good bant.
As for advice:
1) Revise for your mocks/ any end of topic tests. And write notes for these exams too! The more you revise now, the more you understand key concepts etc, the less you have to learn come Easter.
2) Use Memrise for learning vocabulary/important facts/definitions/equations etc. I used it predominately for my Latin, French and History exams and enabled me to get near to 100% in these subjects. I definitely, without a doubt, would not have been able to achieve such a high mark if I hadn't used this website. I used to spend maybe 1/2 hours at a time just going over and over these facts/vocab, again and again and again. I'm very competitive and was encouraged to revise by the way the website gives you points for every right answer you get. I think I'm on over 1.5 million points now or something stupid seeing as you get 45 points for every correct answer. You can 'follow' friends on the website and there is a leader board too so you can try and beat your friends' scores lol.
3) Treat yourself! Don't think you have to work 5+ hours a day every single day of Easter hols/study leave. Don't do this. You will get burn out and will be completely emotionally and academically exhausted by the end of exams. If you want to have a day off, then have a day off. Seriously. I never revised for more than 4/5 hours a day for 6 days a week - at the very maximum
If I think of anything else I will post it
Best of luck for next year, it will be fine and sixth form is super snazzy so look forward to that.